Remarks on Grassmannian Symmetric Spaces

Details Remarks on Grassmannian Symmetric Spaces Remarks on Grassmannian Symmetric Spaces

2009-01-07

arxiv.org/abs/0901.0777v1

Archivum Mathematicum, Vol. 44 (2008), No. 5, 569-585

Mathematics

Differential Geometry

14 pages

Scientific paper

The classical concept of affine locally symmetric spaces allows a generalization for various geometric structures on a smooth manifold. We remind the notion of symmetry for parabolic geometries and we summarize the known facts for $|1|$--graded parabolic geometries and for almost Grassmannian structures, in particular. As an application of two general constructions with parabolic geometries, we present an example of non--flat Grassmannian symmetric space. Next we observe there is a distinguished torsion--free affine connection preserving the Grassmannian structure so that, with respect to this connection, the Grassmannian symmetric space is an affine symmetric space in the classical sense.

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